International banks are suspending credit lines for some independent oil refiners worried about the growing risk of defaults across industries because of the coronavirus epidemic, Reuters reports, citing industry sources. According to the sources, at least three private refiners, or teapots, have had credit lines to the tune of $600 million suspended by banks including French Natixis, Dutch ING, and Singapore DBS Group Holdings. “All our applications for new open-account credits are frozen ... these clean credits are pivotal as we buy 6 to…